A. Cooray

Light from a distant galaxy, bent by a foreground cluster, creates four identical images in the sky. Ordinary matter alone wasn’t enough for such a trick—only by adding invisible dark matter did scientists achieve a match with observations. Now this cross serves as a natural telescope into the unive

ISO 3I/ATLAS is the second known interstellar object. As it approached the Sun, it bared its interior: its icy shell evaporated, revealing a mix of water, carbon dioxide, and carbon compounds. These findings help us understand the chemical makeup of other planetary systems.